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Zone 2 Cardio: Why Endurance Coaches Bring It Up Constantly (and What the Data Shows)

Zone 2 training has become the fitness meme of 2024–2026. The physiology is real. The 80/20 rule is real. But most of what you hear about heart rate zones is wrong.

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venerdì 3 luglio 2026·dev.to
Zone 2 Cardio: Why Endurance Coaches Bring It Up Constantly (and What the Data Shows)
Zone 2 training has become the fitness meme of 2024–2026. The physiology is real. The 80/20 rule is real. But most of what you hear about heart rate zones is wrong.